diff --git a/samudra/models/auth/pengguna.py b/samudra/models/auth/pengguna.py
index 6cfefd8..121e9ca 100644
--- a/samudra/models/auth/pengguna.py
+++ b/samudra/models/auth/pengguna.py
@@ -1,11 +1,27 @@
-from peewee import TextField
+import enum
 
-from samudra.models.base import BaseTable
+from peewee import TextField, BooleanField, ForeignKeyField
+
+from samudra.models.base import BaseTable, BaseStrictTable
+
+
+class RoleEnum(enum.Enum):
+    DEFAULT = 'BIASA'
+
+
+class Keizinan(BaseStrictTable):
+    peranan = TextField(null=False, unique=True)
+    baca = BooleanField(null=False)
+    ubah = BooleanField(null=False)
+    tambah = BooleanField(null=False)
+    buang = BooleanField(null=False)
 
 
 class Pengguna(BaseTable):
     nama = TextField(null=False)
     kunci = TextField(null=False)
+    peranan = ForeignKeyField(model=Keizinan, field=Keizinan.peranan, backref='pengguna',
+                              on_delete='set default', default=RoleEnum.DEFAULT.value)
 
     def __repr__(self) -> str:
         return f"<model.{self.__class__.__name__}: id={self.id} nama={self.nama} kunci={self.kunci}>"
diff --git a/samudra/models/base.py b/samudra/models/base.py
index af121e8..896687c 100644
--- a/samudra/models/base.py
+++ b/samudra/models/base.py
@@ -24,7 +24,7 @@ class BaseMetadataTable(BaseTable):
 
     @classmethod
     def __attach__(
-        cls, other: BaseTable, values: List[Dict[str, str]]
+            cls, other: BaseTable, values: List[Dict[str, str]]
     ) -> pw.ModelSelect:
         rows = [cls.get_or_create(**value)[0] for value in values]
         model_name = getattr(cls, "key", cls.__name__.lower())
@@ -36,3 +36,10 @@ def __attach__(
             except AttributeError:
                 raise AttributeError(f"{cls} has no associated connection table")
         return getattr(other, model_name)
+
+
+class BaseStrictTable(BaseTable):
+    @classmethod
+    def get_or_create(cls, **kwargs):
+        raise AttributeError(
+            f"{cls} is a strict table. Rows can only be defined explicitly by the `Model.create` method.")
diff --git a/samudra/models/core/konsep.py b/samudra/models/core/konsep.py
index bc9b6c2..991dfae 100644
--- a/samudra/models/core/konsep.py
+++ b/samudra/models/core/konsep.py
@@ -7,13 +7,19 @@
     TimestampField,
     BlobField,
     ForeignKeyField,
-    ModelSelect,
+    ModelSelect, CharField,
 )
 
-from models.base import BaseTable, BaseMetadataTable, BaseConnectionTable
+from models.base import BaseTable, BaseMetadataTable, BaseConnectionTable, BaseStrictTable
 from .lemma import Lemma
 
 
+class Golongan(BaseStrictTable):
+    id = CharField(max_length=6, unique=True, null=False)
+    nama = TextField(null=False)
+    keterangan = TextField(null=False)
+
+
 class Konsep(BaseTable):
     """
     Konsep model
@@ -22,8 +28,10 @@ class Konsep(BaseTable):
     lemma = ForeignKeyField(
         model=Lemma, field=Lemma.id, backref="konsep", on_delete="cascade"
     )
-    golongan = TextField(null=False)
-    keterangan = TextField(null=True)
+    # TODO: Create composite key of id and tertib
+    # TODO: Point golongan to an external table with exhaustive list
+    golongan = ForeignKeyField(model=Golongan, field=Golongan.id, on_delete='set null', null=True)
+    keterangan = TextField(null=True, index=True)
     # ---
     tertib = IntegerField(null=True)